Tool for truing cylindrical objects.



w. J. BURGESS. TOOL FOR TRUING CYLINDRICAL OBJECTS.

APPLICATION FILED SEPT- 26, I914.

Patented July 13,, 1915;

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W. J. BURGESS.

TOOL FOR TRUING CYLINDRICAL OBJECTS.v

APPLICATION FILED SEPT. 26. 1914.

1,146,305, Patented July 13, 1915.

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Y moewtoz COLUMBIA FLANDGRAPH c0., WASHINGTON, D. c,

W LLIAM J- E3U3GES O M, L AI IEQENlJt L R T G INDBWAE B EQ S,

Specification of Letters Patent Patented July 13, 1915.

Application filed September 28, 1914. serial No. 863,702.

To all whom it may concern:

Be it known that 1, WILLIAM J. iBUncnss, a citizen of the Dominion of :Canada, residing at Oleum, in the county of Contra Costa, and State of California, have invented new and useful Improvements in Tools for -Truing Cylindrical Objects, of which the following is a specification.

This invention relates to too'ls for truing cylindrical objects, such as crank-pins, journa lpins, wrist-pins and the like, the object being to provide a simple and effective tool which may be readily adjusted to any cylindrical object and which will enable variations to be readily observed thereinand corrected by means of an adjustable cutter bar which is carried by and forms apart of the tool, novel and efficient means being provided for adjusting the cutter bar and keeping the cutting edge in true parallelism with the longitudinal axis of the cylindrical object being acted upon.

l/Vith the above and other objects in view, the invention consists in the novel construction, combination and arrangement ofparts, as herein described, illustrated and claimed.

In the accompanying drawings:Figure 1 is a plan view of the tool of this invention; Fig. 2 is an end elevation of the same; Fig. 3 is a longitudinal section, taken in line with the cutter bar; Fig. 4 is a cross section, taken in line with the fastening means and one of the cutter bar studs; Fig. 5 is a detail perspective view of the two frame members; Fig. 6 is a similar view of the cutter head; Fig. 7 is a plan View of the cutter head with the adjacent face plate removed, showing the adjusting nuts and interposed gear; and Fig. 8 is a detail perspective view of the cutter bar.

The tool for truing cylindrical objects, contemplated in this invention, comprises an open skeleton and substantially cylindrical frame designated generally at A and comprising the two substantially semi-cylindrical sections designated generally at a and b. The section a comprises the semi-circular end bars 1 and the connecting longitudinal bar 2 which is provided with open ended slots 3, the purpose of which will appear. The other frame section 1) comprises the substantially semi-circular end bars 4 and the connecting longitudinal bars 5 and 6, the longitudinal bar 5 being provided with open ended slots 6 adapted to register with the slots 3 above referred to.

'The two frame sections a and b are pivotally connected together at 8 so that they may be thrown open with respect to each other to ermit the frame to be again closed around 1 he pin or other cylindrical object to be operated upon. The free ends of the frame sections co and Z) are fastened together by means of bolts 9, which are pivotally con nected at 10 to the section b of the frame, said bolts being movable into and out of the slots 3 and 6 above referred to and being heldjby nuts 11 shown as milled to facilitate the tightening and loosening of the same by hand. I i

1 2 designates a pair of rollers, which are j'ournal ed in the frame section B, the pintles 13 of said rollers being received in openings therefor in the end bars 4. These rollers which mesh with the teeth of the interposed gear 18 so that as said gear 18 is turned, the nuts 16 and 17 are simultaneously and equally revolved. The cutter head 14 is mounted in fixed relation to the frame section a being secured terminally to the end bars 1 by means of fasteners 20, such as screws or their equivalent.

21 designates a cutter bar provided with a cutting edge 22, said bar extending in parallel relation to the axes of the rollers 12. The cutter bar 21 is formed with sockets 23 to receive the ends of a pair of threaded studs 24, the ends of the studs being received in the sockets 23 in which they are held by set screws 25, thus enabling said studs to be easily removed from the cutter bar. The floor of the cavity or recess 15 is formed with holes 26 to receive the threaded studs 24 and permit the threaded portions of said studs to be engaged by the rotary nuts 16 and 17. The cutter head is also formed with a central hole 27 to receive the rounded lower end 28 of a rotary shaft 29, the central portion of which is squared to fit into a correspondingly shaped opening 80 in the gear 18. Above the squared portion 29 the shaft is provided with a rounded bearing portion 31 which is received in a central opening 32 in the face plate 33, which is secured by fasteners 34: of any suitable description to the outer face of the cutter head 14. The shaft 29 finally terminates in a squared end portion 35 which is received in a squared socket or bore of a cap nut 36 having a polygonal face 39 adapted to receive a wrench whereby said cap and the shaft 29 may be turned for revolving the gear wheel 18 and simultaneously turning the nuts 16 and 17 to advance or retract the cutter bar 21.

38 designates housing tubes extending outwardly from the face plate 33 to inclose the studs 24- and admit of the necessary longitudinal movement of the latter.

The inner face of the cutter head 14 is cut away as shown at 39 to form a seat for a cutter bar 21 and the end bars 1 of the frame section A are likewise cut away at 10 to register with the cutaway-portion 39 of the cutter head for a like purpose.

In order to facilitate the turning of the tool around the work which is ordinarily held stationary, a plurality of handles 41 are provided having forks 42, which are terminally secured at 13 to the end bars 1 and l'of the frame members a: and b. The operator by grasping one after the other of the handles 41 may revolve or turn around the work or object being treated until said object is brought to atrue cylindrical surface. The device will be found particularly valuable in truing up by hand crank pins,

journals, wrist pins and similar bearing parts of engines and all kinds of machinery.

While the device is particularly useful on vessels at sea or at any points remote from repair places, said device will also be found extremely useful in machine shops generally.

It will, of course, be understood that the device may be manufactured in various sizes to accommodate cylindrical objects of varying diameters and lengths. These and other changes in the form, proportion and minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention.

I claim In a tool of the class specified, a frame embodying a pair of semi-cylindrical sections separably connected together, parallel worksupporting rollers journaled in said frame in spaced relation to each other, a cutter head carried by and bearing a fixed relation to one frame section, a cutter bar extending in a plane parallel to the longitudinal axes of said rollers, threaded studs on said cutter bar, adjusting nuts on said studs rotatable in relation to the cutter head, and means for simultaneously and equally rotating said nuts.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM J. BURGESS. Witnesses:

HENRY JENSEN, R. YAKOLSEN.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

